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Patent
Yancheng Institute of Technology | Date: 2016-01-12

By measuring speeds and deflection angles of two front wheels in real time, and according to values of gravity sensors at four wheel axles, and an axle base and a wheel base of an automobile, a center of gravity of the automobile is determined; moving speeds of the left and right front wheels of the automobile around an instantaneous center during cornering are converted into moving speeds at the center of gravity of the automobile respectively, and an average value of the two automobile speeds at the center of gravity of the automobile is taken as an actual driving speed of the vehicle during cornering; meanwhile, an automobile speed may be controlled according to force conditions of four wheels.


Patent
Yancheng Institute of Technology | Date: 2015-12-30

An automobile cornering rollover prevention control system includes a controller, four hydraulic oil cylinders, a deflection measuring instrument and a rotation speed measuring instrument. The controller is mounted inside the automobile, and includes a data acquisition module, a data processing module and a data execution module, wherein the data acquisition module and the data execution module are connected to the data processing module, an input end of the data acquisition module is electrically connected to the deflection measuring instrument and the rotation speed measuring instrument, and an output end of the data execution module is connected to control ends of the four hydraulic oil cylinders respectively. The deflection measuring instrument and the rotation speed measuring instrument are mounted on a left front wheel of the automobile, and two hydraulic oil cylinders are mounted between an automobile frame and a front axle, and the other two hydraulic oil cylinders are mounted between the automobile frame and a rear axle.


Patent
Yancheng Institute of Technology | Date: 2016-01-04

A gear dynamic transmission error determination method includes calculating a collision time interval via parameter values such as the angular velocity of an input shaft measured by an angle coder, a drag torque of an output shaft provided by a magnetic powder brake, a gear backlash, and angular displacements of the input shaft and the output shaft; and comparing a relative displacement contained with the gear backlash, until a value of the relative displacement falls within an appropriate interval and meets requirements, the result obtained being namely a transmission error with relatively high accuracy.


Patent
Yancheng Institute of Technology | Date: 2016-01-12

A vehicle rear wheel steering assist control system is provided where a wheel deflection angle measuring instrument is mounted at a front wheel for measuring a steering angle of the front wheel, a rotational velocity measuring instrument is also mounted at the front wheel for testing a velocity of the front wheel, output ends of the wheel deflection angle measuring instrument and the rotational velocity measuring instrument are electrically connected to the data acquisition module, the data acquisition module is electrically connected to the controller, the controller is electrically connected to a data execution module, the rear wheel active steering device is mounted at a rear wheel of the automobile, the rear wheel active steering device is electrically connected to the data execution module, the controller is electrically connected to an ECU of the automobile, each automobile seat is provided with a weight sensor, which are electrically connected to the controller.


Patent
Yancheng Institute of Technology | Date: 2016-01-12

An automobile cornering rollover prevention system comprises a speed controller, a wheel deflection measuring instrument mounted on a front wheel of the automobile, force sensors mounted on axis positions of four wheels, and an angular speed measuring instrument and a speed controller mounted on the front wheel of the automobile, and the wheel deflection measuring instrument, the angular speed measuring instrument and the force sensor are all electrically connected to the speed controller. The speed controller is connected to a brake system of the automobile, so that the speed can be intelligently reduced through the brake system. When a driver changes _(1 )according to a road condition, the speed controller may calculate a critical radius in real time and then compare the speed and give a command in real time for controlling the speed, so that the speed is maintained in an ideal range.


Wang Z.-G.,Yancheng Institute of Technology
Applied Mechanics and Materials | Year: 2013

Stepped distributed dynamic systems are widely used in the engineering fields, and the dynamic characteristics analysis of them is very important. In this paper, the axial vibration of a stepped bar consisting of two uniform sections is studied, in order to solve the dynamic equation, the differential transformation method is used, the governing differential equation and the boundary conditions of the bar become simple algebraic equations. Doing some simple algebraic operations for these equations, the closed form solution of natural frequency, mode shape and the dynamic response can be obtained. Comparison the results obtained by the differential transformation method and finite element method, excellent agreement is achieved, and the effects of the stiffness of spring is discussed in this paper. © (2013) Trans Tech Publications, Switzerland.


Luo J.,Yancheng Institute of Technology
Materials Letters | Year: 2012

Nanosized Nd-doped strontium ferrites, SrNd xFe 12-xO 19, with x = 0.0-0.5, were successfully prepared through a chemical coprecipitation process. The samples were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF) and vibrating sample magnetometer (VSM). Various parameters such as lattice constants (a and c) and crystallite size were calculated from the XRD data. The crystallite size was in the range of 28-39 nm. The specific saturation magnetization (M s) and the coercivity (H c) of strontium ferrites could be improved by substitutions of Nd 3+ ions on Fe 3+ ion basis sites. The M s revealed magnetic behavior with respect to Nd 3+ ion concentration, showing a decrease. The H c increased with increasing Nd 3+ ion concentration. © 2012 Elsevier B.V. All rights reserved.


Yao Z.,Nanjing University of Aeronautics and Astronautics | Xiao L.,Yancheng Institute of Technology
IEEE Transactions on Industrial Electronics | Year: 2013

This paper presents a control of single-phase grid-interactive inverters with nonlinear loads. The utility-connected inverter should operate at both stand-alone and grid-connected modes. However, the waveform qualities of the grid current in grid-connected mode and the output voltage in stand-alone mode are poor under the nonlinear critical load with the conventional control. The impact of the nonlinear load on the grid current is analyzed. The proposed control is illustrated in detail. By adding the load current into the filter inductor current loop, the influence of the nonlinear load on the grid current can be eliminated, and the waveform quality of the output voltage in stand-alone mode can be improved. The control method is simple and easy to be achieved. The grid-connected inverter is stable at both modes. The filter inductor is chosen. Simulation and experimental results from a 1-kW dual-buck full-bridge grid-interactive inverter with a diode rectifier load verify the theoretical analysis. © 2012 IEEE.


Ruiz-Baier R.,Ecole Polytechnique Federale de Lausanne | Tian C.,Yancheng Institute of Technology
Nonlinear Analysis: Real World Applications | Year: 2013

Cross-diffusion driven instabilities have gained a considerable attention in the field of population dynamics, mainly due to their ability to predict some important features in the study of the spatial distribution of species in ecological systems. This paper is concerned with some mathematical and numerical aspects of a particular reaction-diffusion system with cross-diffusion, modeling the effect of allelopathy on two plankton species. Based on a stability analysis and a series of numerical simulations performed with a finite volume scheme, we show that the cross-diffusion coefficient plays a important role on the pattern selection. © 2012 Published by Elsevier Ltd.


Tian C.,Yancheng Institute of Technology
Chaos | Year: 2012

Spatial patterns have received considerable attention in the physical, biological, and social sciences. Generally speaking, time delay is a prevailing phenomenon in aquatic environments, since the production of allelopathic substance by competitive species is not instantaneous, but mediated by some time lag required for maturity of species. A natural question is how delay affects the spatial patterns. Here, we consider a delayed plankton allelopathic system consisting of two competitive species and analytically investigate how the time delay affects the stability and spatial patterns. Based upon a stability analysis, we demonstrate that the delay can induce spatial patterns under some conditions. Moreover, by use of a series of numerical simulations performed with a finite difference scheme, we show that the delay plays an important role on pattern selection. © 2012 American Institute of Physics.

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